Puncture-proof pneumatic tire.



R. WAPSHARE.

PUNCTURE PROOF PNEUMATIC TIRE.

APPLICATION FILED JULY 8,1914.

1 ,QQU, 9 1 Patented Mar. 27, 1917;

IF HULL Witnesses- Wor .llttorney.

-r NIIRRIS PETERS co FNOTIJ-LIYHON WASHINGION. 0

RICHARD WAPSHARE, 0F WESTWARD HO, BANGALUR, BRITISH INDIA.

PUNCTURE-PROOF PNEUMATIC TIRE.

Specification of Letters Patent.

Patented Mar. 27, 1917..

Application filed July 8, 1914. Serial No. 849,828.

To all whom it may concern:

Be it known that I, Riel-nun) WAPSIIARE, a subject of the King of GreatBritain and Ireland, residing at Vestward Ho, Bangalur, British India,have invented certain new and useful Improvements in Puncture-ProofPneumatic Tires, of which the following is a specification.

This invention relates topneumatic tires for wheels of,vehicles,particularly motor cars and motor cycles, and has for its object toprovide means for preventing the puncturing of such tires withoutgreatly increasing their weight or impairing their resili-' ency.

According to this invention a pneumatic tire is provided with aprotective sheath consisting of a plurality of plates of glass,porcelain, earthenware, or other vitreous substance, papier mach, fiberor the like, each of said plates having two of its edges convex and twoconcave, the convex edges of one plate being adapted to seat in theconcave edges of other plates, and the sheath as a whole beinginterposed between the layers of fabric in the tread of the tire, orsecured to a band of fabric and interposed between the air tube and thecovering of the tire.

Referring to the accompanying drawings, Figure 1 is a transverse sectionof one form of tire made in accordance with this invention; Fig. 2 is across-section on the line 22, Fig. 1; and Fig. 3 is a face view of amodified form of plate.

Inter-posed between the layers of fabric a in the tread of the tireshown in Figs. 1 and 2 is a protective sheath consisting of a pluralityof plates of glass 6 each of which has two edges concave and two convex,the convex edges of one plate being adapted to seat in the concave edgesof the adjacent plates as clearly shown in Figs. 1 and 2. Those plates 6which lie at the edges of the protective sheath are beveled at theirouter edges and said edges preferably butt against annular rubber padsc, 0.

The plates 6 may be freely arranged in the outer cover of the tire asshown in Figs. 1 and 2, or some or all of them may be per forated andsewn to a band of fabric in order during the manufacture of the tire.

In Fig. 8 is shown, on an enlarged scale, a modified form of plate whichis formed with a recess (Z and cross-piece 6 around which may be passedthe thread or like material by which the plates are attached to afoundation. In Fig. 3 the convex edges 7", f and the concave edges 9, gare shown.

Owing to the fact that glass is a poor conductor of heat the cover ofthe tire is not liable to damage due to heat set up by friction, andowing to the formation of the protective sheath, the resiliency of thetire is not impaired while it is rendered unpuncturablc.

What I claim as my invention and desire to secure by Letters Patentis 1. A pneumatic tire protector provided with a protecting sheathcomprising a plurality of plates so disposed that more than two edges ofone plate abut against the edges of the adjacent plates, the adjacentedges of two contiguous plates being formed throughout their length theone concave the other convex in a plane perpendicular to the faces ofthe plate.

2. A pneumatic tire protector provided with a protecting sheathcomprising a plurality of plates so disposed that more than two edges ofone plate abut against the edges of the adjacent plates, the adjacentedges of two contiguous plates being formed throughout their length theone concave theother convex in a plane perpendicular to the faces of theplate and each plate having two concave and two convex edges.

3. A pneumatic tire protector provided with a protecting sheathcomprising a plurality of plates so disposed that more than two edges ofone plate abut against the edges of the adjacent plates, the adjacentedges of two contiguous plates being formed throughout their length theone concave the other convex in a plane perpendicular to the faces ofthe plate, and a foundation to which said plates are secured.

In testimony whereof I have hereunto signed my name to thisspecification in the presence of two subscribing witnesses.

RICHARD VVAPSHARE.

Witnesses:

P. MICHAEL THAMBUsAwMY, H. F. BALARAME.

Gopies of this patent may be obtained. for five cents each, byaddressing the Commissioner of Patents, Washington, D. G.

